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US12372754B2ActiveUtilityPatentIndex 51

Optical lens assembly and a photographing module

Assignee: NEWMAX TECHNOLOGY CO LTDPriority: Aug 10, 2022Filed: Oct 24, 2022Granted: Jul 29, 2025
Est. expiryAug 10, 2042(~16.1 yrs left)· nominal 20-yr term from priority
Inventors:HUANG CHING-YUN
G02B 9/62G02B 13/18G02B 13/00G02B 13/008G02B 13/06G02B 13/0045
51
PatentIndex Score
0
Cited by
3
References
20
Claims

Abstract

An optical lens assembly includes, in order from an object side to an image side: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with positive refractive power; a stop; a fourth lens with positive refractive power; a fifth lens with negative refractive power; and a sixth lens with positive refractive power. Half of a maximum field of view of the optical lens assembly is HFOV, an entrance pupil diameter of the optical lens assembly is EPD, a distance from an object-side surface of the first lens to an image plane along an optical axis is TL, a central thickness of the fifth lens along the optical axis is CTS, a radius of curvature of an image-side surface of the fifth lens is R10. Following conditions are satisfied: 3.81 deg.<HFOV*EPD/TL<6.24 deg. and −1.9 mm 2 <CT5*R10<−0.2 mm 2 .

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. An optical lens assembly, in order from an object side to an image side, comprising:
 a first lens with negative refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the first lens being convex in a paraxial region thereof, the image-side surface of the first lens being concave in a paraxial region thereof, and the first lens being made of glass; 
 a second lens with negative refractive power, comprising an object-side surface and an image-side surface, the image-side surface of the second lens being concave in a paraxial region thereof, and one of the object-side surface and the image-side surface of the second lens being aspheric; 
 a third lens with positive refractive power, comprising an object-side surface and an image-side surface, the image-side surface of the third lens being convex in a paraxial region thereof, and one of the object-side surface and the image-side surface of the third lens being aspheric; 
 a stop; 
 a fourth lens with positive refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the fourth lens being convex in a paraxial region thereof, the image-side surface of the fourth lens being convex in a paraxial region thereof, and one of the object-side surface and the image-side surface of the fourth lens being aspheric; 
 a fifth lens with negative refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the fifth lens being concave in a paraxial region thereof, the image-side surface of the fifth lens being convex in a paraxial region thereof, and one of the object-side surface and the image-side surface of the fifth lens being aspheric; and 
 a sixth lens with positive refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the sixth lens being convex in a paraxial region thereof, the image-side surface of the sixth lens being concave in a paraxial region thereof, and one of the object-side surface and the image-side surface of the sixth lens being aspheric; 
 wherein half of a maximum field of view of the optical lens assembly is HFOV, an entrance pupil diameter of the optical lens assembly is EPD, a distance from the object-side surface of the first lens to an image plane along an optical axis is TL, a central thickness of the fifth lens along the optical axis is CT5, a radius of curvature of the image-side surface of the fifth lens is R10, and following conditions are satisfied: 3.81 deg.<HFOV*EPD/TL<6.24 deg. and −1.9 mm 2 <CT5*R10<−0.2 mm 2 . 
 
     
     
       2. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the optical lens assembly is f, a focal length of the first lens is f1, and a following condition is satisfied: −0.46<f/f1<−0.09. 
     
     
       3. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the optical lens assembly is f, a focal length of the fifth lens is f5, and a following condition is satisfied: −0.99<f/f5<−0.43. 
     
     
       4. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the third lens is f3, and a following condition is satisfied: 0.99 mm<f1*f2/f3<2.84 mm. 
     
     
       5. The optical lens assembly as claimed in  claim 1 , wherein a central thickness of the first lens along the optical axis is CT1, a central thickness of the second lens along the optical axis is CT2, a central thickness of the third lens along the optical axis is CT3, and a following condition is satisfied: 1.30<(CT1+CT2)/CT3<2.58. 
     
     
       6. The optical lens assembly as claimed in  claim 1 , wherein the distance from the object-side surface of the first lens to the image plane along the optical axis is TL, a maximum image height of the optical lens assembly is IMH, a the following condition is satisfied: 2.27<TL/(IMH*2)<3.56. 
     
     
       7. The optical lens assembly as claimed in  claim 1 , wherein a distance from the image-side surface of the sixth lens to the image plane along the optical axis is BFL, a maximum image height of the optical lens assembly is IMH, and a following condition is satisfied: 0.55<BFL/IMH<1.13. 
     
     
       8. The optical lens assembly as claimed in  claim 1 , wherein an Abbe number of the fourth lens is vd4, an Abbe number of the fifth lens is vd5, and a following condition is satisfied: 28.5<vd4−vd5<44.1. 
     
     
       9. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the optical lens assembly is f, a radius of curvature of the object-side surface of the first lens is R1, a radius of curvature of the image-side surface of the first lens is R2, and a following condition is satisfied: 1.20 mm<f*(R1/R2)<4.16 mm. 
     
     
       10. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the fourth lens is f4, a focal length of the sixth lens is f6, a central thickness of the fourth lens along the optical axis is CT4, a central thickness of the sixth lens along the optical axis is CT6, and a following condition is satisfied: 0.66 mm<f4*f6/(CT4+CT6)<1.89 mm. 
     
     
       11. The optical lens assembly as claimed in  claim 1 , wherein a radius of curvature of the object-side surface of the fourth lens is R7, a radius of curvature of the image-side surface of the fourth lens is R8, and a following condition is satisfied: −2.20<R7/R8<−1.04. 
     
     
       12. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the third lens is f3, a focal length of the fourth lens is f4, a central thickness of the third lens along the optical axis is CT3, a central thickness of the fourth lens along the optical axis is CT4, and a following condition is satisfied: 0.22<f3*CT3/(f4*CT4)<0.48. 
     
     
       13. The optical lens assembly as claimed in  claim 1 , wherein a focal length of the optical lens assembly is f, a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, and a following condition is satisfied: −1.19 mm −2 <f/(f4*f5*f6)<−0.27 mm −2 . 
     
     
       14. A photographing module, comprising:
 a lens barrel, 
 an optical lens assembly disposed in the lens barrel, and 
 an image sensor disposed on an image plane of the optical lens assembly, 
 wherein the optical lens assembly, in order from an object side to an image side, comprising:
 a first lens with negative refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the first lens being convex in a paraxial region thereof, the image-side surface of the first lens being concave in a paraxial region thereof, and the first lens being made of glass; 
 a second lens with negative refractive power, comprising an object-side surface and an image-side surface, the image-side surface of the second lens being concave in a paraxial region thereof, and one of the object-side surface and the image-side surface of the second lens being aspheric; 
 a third lens with positive refractive power, comprising an object-side surface and an image-side surface, the image-side surface of the third lens being convex in a paraxial region thereof, and one of the object-side surface and the image-side surface of the third lens being aspheric; 
 a stop; 
 a fourth lens with positive refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the fourth lens being convex in a paraxial region thereof, the image-side surface of the fourth lens being convex in a paraxial region thereof, and one of the object-side surface and the image-side surface of the fourth lens being aspheric; 
 a fifth lens with negative refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the fifth lens being concave in a paraxial region thereof, the image-side surface of the fifth lens being convex in a paraxial region thereof, and one of the object-side surface and the image-side surface of the fifth lens being aspheric; and 
 a sixth lens with positive refractive power, comprising an object-side surface and an image-side surface, the object-side surface of the sixth lens being convex in a paraxial region thereof, the image-side surface of the sixth lens being concave in a paraxial region thereof, and one of the object-side surface and the image-side surface of the sixth lens being aspheric; 
 
 wherein half of a maximum field of view of the optical lens assembly is HFOV, an entrance pupil diameter of the optical lens assembly is EPD, a distance from the object-side surface of the first lens to an image plane along an optical axis is TL, a central thickness of the fifth lens along the optical axis is CT5, a radius of curvature of the image-side surface of the fifth lens is R10, and following conditions are satisfied: 3.81 deg.<HFOV*EPD/TL<6.24 deg. and −1.9 mm 2 <CT5*R10<−0.2 mm 2 . 
 
     
     
       15. The photographing module as claimed in  claim 14 , wherein a focal length of the optical lens assembly is f, a focal length of the fifth lens is f5, and a following condition is satisfied: −0.99<f/f5<−0.43. 
     
     
       16. The photographing module as claimed in  claim 14 , wherein a central thickness of the first lens along an optical axis is CT1, a central thickness of the second lens along the optical axis is CT2, a central thickness of the third lens along the optical axis is CT3, and a following condition is satisfied: 1.30<(CT1+CT2)/CT3<2.58. 
     
     
       17. The photographing module as claimed in  claim 14 , wherein a distance from the object-side surface of the first lens to the image plane along an optical axis is TL, a maximum image height of the optical lens assembly is IMH, and a following condition is satisfied: 2.27<TL/(IMH*2)<3.56. 
     
     
       18. The photographing module as claimed in  claim 14 , wherein a focal length of the optical lens assembly is f, a radius of curvature of the object-side surface of the first lens is R1, a radius of curvature of the image-side surface of the first lens is R2, and a following condition is satisfied: 1.20 mm<f*(R1/R2)<4.16 mm. 
     
     
       19. The photographing module as claimed in  claim 14 , wherein a focal length of the fourth lens is f4, a focal length of the sixth lens is f6, a central thickness of the fourth lens along an optical axis is CT4, a central thickness of the sixth lens along the optical axis is CT6, and a following condition is satisfied: 0.66 mm<f4*f6/(CT4+CT6)<1.89 mm. 
     
     
       20. The photographing module as claimed in  claim 14 , wherein a focal length of the third lens is f3, a focal length of the fourth lens is f4, a central thickness of the third lens along an optical axis is CT3, a central thickness of the fourth lens along the optical axis is CT4, and a following condition is satisfied: 0.22<f3*CT3/(f4*CT4)<0.48.

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